Malmö University Publications
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
APOGEE Chemical Abundance Patterns of the Massive Milky Way Satellites
Univ Utah, Dept Phys Astron, Salt Lake City, UT 84112 USA..
Univ Washington, Dept Astron, Seattle, WA 98195 USA..
Univ Utah, Dept Phys Astron, Salt Lake City, UT 84112 USA..
Ohio State Univ, Dept Astron, 140 W 18th Ave, Columbus, OH 43210 USA.;Ohio State Univ, Dept Astron, 140 W 18th Ave, Columbus, OH 43210 USA.;Ohio State Univ, Ctr Cosmol & AstroParticle Phys, 140 W 18th Ave, Columbus, OH 43210 USA..ORCID iD: 0000-0001-7775-7261
Show others and affiliations
2021 (English)In: Astrophysical Journal, ISSN 0004-637X, E-ISSN 1538-4357, Vol. 923, no 2, article id 172Article in journal (Refereed) Published
Abstract [en]

The SDSS-IV Apache Point Observatory Galactic Evolution Experiment (APOGEE) survey has obtained high-resolution spectra for thousands of red giant stars distributed among the massive satellite galaxies of the Milky Way (MW): the Large and Small Magellanic Clouds (LMC/SMC), the Sagittarius Dwarf Galaxy (Sgr), Fornax (Fnx), and the now fully disrupted Gaia Sausage/Enceladus (GSE) system. We present and analyze the APOGEE chemical abundance patterns of each galaxy to draw robust conclusions about their star formation histories, by quantifying the relative abundance trends of multiple elements (C, N, O, Mg, Al, Si, Ca, Fe, Ni, and Ce), as well as by fitting chemical evolution models to the [alpha/Fe]-[Fe/H] abundance plane for each galaxy. Results show that the chemical signatures of the starburst in the Magellanic Clouds (MCs) observed by Nidever et al. in the alpha-element abundances extend to C+N, Al, and Ni, with the major burst in the SMC occurring some 3-4 Gyr before the burst in the LMC. We find that Sgr and Fnx also exhibit chemical abundance patterns suggestive of secondary star formation epochs, but these events were weaker and earlier (similar to 5-7 Gyr ago) than those observed in the MCs. There is no chemical evidence of a second starburst in GSE, but this galaxy shows the strongest initial star formation as compared to the other four galaxies. All dwarf galaxies had greater relative contributions of AGB stars to their enrichment than the MW. Comparing and contrasting these chemical patterns highlight the importance of galaxy environment on its chemical evolution.

Place, publisher, year, edition, pages
Institute of Physics (IOP), 2021. Vol. 923, no 2, article id 172
National Category
Astronomy, Astrophysics and Cosmology
Identifiers
URN: urn:nbn:se:mau:diva-49215DOI: 10.3847/1538-4357/ac25f9ISI: 000731761500001Scopus ID: 2-s2.0-85123869087OAI: oai:DiVA.org:mau-49215DiVA, id: diva2:1626004
Available from: 2022-01-10 Created: 2022-01-10 Last updated: 2024-02-05Bibliographically approved

Open Access in DiVA

No full text in DiVA

Other links

Publisher's full textScopus

Authority records

Jönsson, Henrik

Search in DiVA

By author/editor
Weinberg, David H.Jönsson, Henrik
By organisation
Department of Materials Science and Applied Mathematics (MTM)
In the same journal
Astrophysical Journal
Astronomy, Astrophysics and Cosmology

Search outside of DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 45 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf